Hardcore gamer Kwon Yu (JI Chang-wook) wastes his life away playing video games at internet cafes. But after he returns a lost phone, he is arrested and given life imprisonment for sexually assaulting and murdering a minor. With the help of his online teammates, he has a chance to clear his name. As they dig into his case, they uncover a massive plot and a shadowy organization that puts innocent people to prison on behalf of powerful men in the country....